Re: Merge ftrace data of host and guest

[Steven Rostedt]

On Fri, Dec 19, 2014 at 05:52:52PM +0530, Divya Vyas wrote:
> Hi,

Hi, it would be  helpful if you Cc'd me. I would have responded quicker. Luckily,
someone noticed this email and told me about it.

> 
> I think it is not desired output . Ths script is written for diffrent
> format .ftrace format is ( trace-cmd report command generates) :

I'm actually working on trace-cmd this week and hopefully I'll be able to release
2.5 by x-mas.

I believe that Masami is going to start continuing work on the virt guest
tracer for trace-cmd.

Also, for now, for a crud way of merging, if both the gettimeofday clocks
of the host and guest are synced, you could do:

guest> trace-cmd record -o guest.dat --date  ...

host> trace-cmd record -o host.dat --date ...

and then run:

trace-cmd report -i guest.dat -i host.dat

and trace-cmd will merge the two. The --date will add a way to sync the trace
timestamps to a wall clock and that will be used to try to interleave the
events of both the data files.

-- Steve

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